Node and method performed by the node in wireless communication system

Abstract

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Disclosed is a method performed by a first node in a wireless communication system including performing channel estimation on an echo signal of a first signal transmitted by the first node, determining a first filter based on a result of the channel estimation and a distance between the first node and a target, and performing a first filtering process on the result of channel estimation based on the first filter.

What is claimed is: 
     
       1. A method performed by a first node in a wireless communication system, the method comprising:
 performing channel estimation on an echo signal of a first signal transmitted by the first node; 
 determining a first filter based on a result of the channel estimation and a distance between the first node and a target; and 
 performing a first filtering process on the result of channel estimation based on the first filter. 
 
     
     
       2. The method of  claim 1 , wherein, determining the first filter further comprises:
 determining a maximum main lobe power of the echo signal based on the result of channel estimation; and 
 determining the first filter based on the maximum main lobe power and noise power. 
 
     
     
       3. The method of  claim 1 , wherein, determining the first filter further comprises:
 determining a maximum main lobe power of the echo signal, a first distance between the first node and a first target corresponding to the maximum main lobe power, a minimum main lobe power of the echo signal, and a second distance between the first node and a second target corresponding to the minimum main lobe power, based on the result of channel estimation; and 
 determining the first filter, based on the maximum main lobe power, the first distance, the minimum main lobe power, the second distance, and the noise power. 
 
     
     
       4. The method of  claim 1 , wherein the distance between the first node and the target is determined based on the result of channel estimation or is received from a second node. 
     
     
       5. The method of  claim 4 , further comprising transmitting, to the second node, a distance between the second node and the target,
 wherein different distances correspond to different filters, or a plurality of the different distances correspond to a same filter. 
 
     
     
       6. The method of  claim 4 , further comprising obtaining a first target detection result of the first node based on the result of channel estimation after the first filtering process;
 performing a second filtering process on the result of channel estimation based on a filter used by the first node in at least one previous sensing cycle; and 
 in a case that a second result of channel estimation after the second filtering process and a first result of channel estimation after the first filtering process in the at least one previous sensing cycle satisfy a first condition, determining the first filter based on the result of channel estimation and the distance between the first node and the target. 
 
     
     
       7. The method of  claim 6 , further comprising:
 receiving, from the second node, third configuration information for configuring a sensing cycle of the first node; and 
 transmitting, to the second node, fourth configuration information for configuring a sensing cycle of the second node. 
 
     
     
       8. The method of  claim 2 , wherein the noise power is preconfigured or is estimated based on a received signal of the first node comprising an echo signal. 
     
     
       9. The method of  claim 8 , wherein, determining a second filter comprises:
 performing a third filtering process on the result of channel estimation by using the second filter; and 
 determining the second filter based on the result of channel estimation after the third filtering process and the distance between the first node and the target. 
 
     
     
       10. The method of  claim 6 , further comprising transmitting, to the second node, the first target detection result of the first node,
 wherein, the first node and the second node are one of a terminal, a base station and a road side unit. 
 
     
     
       11. A first node in a wireless communication system, the first node comprising:
 a transceiver; and 
 at least one processor coupled to the transceiver and configured to: 
 perform channel estimation on an echo signal of a first signal transmitted by the first node, 
 determine a first filter based on a result of the channel estimation and a distance between the first node and a target, and 
 perform a first filtering process on the result of channel estimation based on the first filter. 
 
     
     
       12. The first node of  claim 11 , wherein at least one processor is further configured to:
 determine a maximum main lobe power of the echo signal based on the result of channel estimation, and 
 determine the first filter based on the maximum main lobe power and noise power. 
 
     
     
       13. The first node of  claim 11 , wherein, at least one processor is further configured to:
 determine a maximum main lobe power of the echo signal, a first distance between the first node and a first target corresponding to the maximum main lobe power, a minimum main lobe power of the echo signal, and a second distance between the first node and a second target corresponding to the minimum main lobe power, based on the result of channel estimation; and 
 determine the first filter, based on the maximum main lobe power, the first distance, the minimum main lobe power, the second distance, and the noise power. 
 
     
     
       14. The first node of  claim 11 , wherein the distance between the first node and the target is determined based on the result of channel estimation or is received from a second node. 
     
     
       15. The first node of  claim 14 , wherein at least one processor is further configured to transmit, to the second node, a distance between the second node and the target, and
 wherein different distances correspond to different filters, or a plurality of the different distances correspond to a same filter. 
 
     
     
       16. The first node of  claim 14 , wherein at least one processor is further configured to:
 obtain a first target detection result of the first node based on the result of channel estimation after the first filtering process, 
 perform a second filtering process on the result of channel estimation based on a filter used by the first node in at least one previous sensing cycle, and 
 in a case that a second result of channel estimation after the second filtering process and a first result of channel estimation after the first filtering process in the at least one previous sensing cycle satisfy a first condition, determine the first filter based on the result of channel estimation and the distance between the first node and the target. 
 
     
     
       17. The first node of  claim 16 , wherein at least one processor is further configured to:
 receive, from the second node, third configuration information for configuring a sensing cycle of the first node, and 
 transmit, to the second node, fourth configuration information for configuring a sensing cycle of the second node. 
 
     
     
       18. The first node of  claim 12 , wherein the noise power is preconfigured or is estimated based on a received signal of the first node comprising an echo signal. 
     
     
       19. The first node of  claim 18 , wherein at least one processor is further configured to:
 perform a third filtering process on the result of channel estimation by using the second filter and 
 determine the second filter based on the result of channel estimation after the third filtering process and the distance between the first node and the target. 
 
     
     
       20. The first node of  claim 16 , wherein at least one processor is further configured to transmit, to the second node, the first target detection result of the first node, and
 wherein, the first node and the second node are one of a terminal, a base station and a road side unit.